The diagram shows four congruent right-angled triangles $$\(A B J, B C I, C D H\)$$ and $$\(D E G\)$$. The diagram also shows the straight line $$\(A B C D E F\)$$. Diagram NOT accurately drawn Work out the length of $$\(E F\)$$. Give your answer correct to 3 significant figures. $$\(\mathrm{cm}\)$$

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